private void button1_Click(object sender, EventArgs e)
{
    int[] i = new int[] { 1, 3, 5, 7, 9 };
    for (int j = 0; j < 2 << i.Length - 1; j++)
    {
        for (int k = 0; k < i.Length; k++)
        {
            if (k > 0) Console.Write(",");
            if ((j >> k & 1) == 1)
                Console.Write(100);
            else Console.Write(i[k]);
        }
        Console.WriteLine();
    }
}